Rejection of Organic Micropollutants by Clean and Fouled Nanofiltration Membranes

Table 4

Effect of ionic strength on rejection of compounds by the two NF membranes (transmembrane pressure 500 kPa, pH 7.5; initial concentration of compounds 0.5–0.8 mg L⁻¹).

Membrane/ionic strength	Flux (L m^−2 h^−1)	Dimethyl phthalate (%)	Diethyl phthalate (%)	Acenaphthylene (%)	Phenanthrene (%)
NF90
10 mM	34.6	95.0	96.0	91.2	96.0
20 mM	37.1	93.0	95.0	91.2	93.1
NF270
10 mM	72.3	65.8	75.6	87.3	92.5
20 mM	87.3	25.0	33.3	82.4	88.6